Spectra and elliptic flow of light hadrons in an expanding fire-cylinder model for the RHIC Beam Energy Scan

Abstract

We investigate the transverse momentum spectra ($p_T$) and elliptic flow ($v_2$) of ${\pi }^{\pm }$, $K^{\pm }$, $p$, and $\bar{p}$ produced in peripheral Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=7.7$, 11.5, 19.6, 27, and 39 GeV in the Beam Energy Scan (BES) Program at the Relativistic Heavy Ion Collider (RHIC). The analysis is carried out within an expanding elliptic fire-cylinder model that incorporates longitudinal expansion and anisotropic transverse flow. Particle production at kinetic freeze-out is obtained using a local equilibrium distribution function with a blast-wave-like fluid velocity profile derived from the expansion dynamics of the elliptic fire-cylinder. The model parameters governing the collective expansion are first constrained by fitting the midrapidity $p_T$ spectra of ${\pi }^{\pm }$ and are then applied, without further adjustment, to $K^{\pm }$, $p$, and $\bar{p}$. The model provides a consistent description of the $p_T$ spectra and reproduces the qualitative behavior of the elliptic flow for all considered particle species.

arXiv comment(8+4) figures, 5 tables, (14 + 3) pages, accepted in Nuclear Physics A

References in corpus (56)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Collective flow and viscosity in relativistic heavy-ion collisions
• Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
• Thermal phenomenology of hadrons from 200 AGeV S+S collisions
• Radial and elliptic flow at RHIC: further predictions
• Heavy Ion Collisions: The Big Picture, and the Big Questions
• Hadron production in central nucleus-nucleus collisions at chemical freeze-out
• Hydrodynamic Modeling of Heavy-Ion Collisions
• What RHIC Experiments and Theory tell us about Properties of Quark-Gluon Plasma ?
• Decoding the phase structure of QCD via particle production at high energy
• The Effect of Shear Viscosity on Spectra, Elliptic Flow, and HBT Radii
• Azimuthal anisotropy in Au+Au collisions at sqrtsNN = 200 GeV
• Bulk Properties of the Medium Produced in Relativistic Heavy-Ion Collisions from the Beam Energy Scan Program
• Energy Dependence of Pion and Kaon Production in Central Pb+Pb Collisions
• Why does the Quark-Gluon Plasma at RHIC behave as a nearly ideal fluid ?
• The Quark-Gluon Plasma in Equilibrium
• Heavy-Quark Probes of the Quark-Gluon Plasma at RHIC
• Chemical and Thermal Freeze-Out Parameters from 1 to 200 A.GeV
• Unified Description of Freeze-Out Parameters in Relativistic Heavy Ion Collisions
• Hadronic Production of Thermal Photons
• The Search for the Quark-Gluon Plasma
• Identified Particle Elliptic Flow in Au+Au Collisions at $\sqrt{s_{{}_{NN}}}=130$ GeV}
• Observable implications of geometrical and dynamical aspects of freeze-out in heavy ion collisions
• Nuclear Stopping in Au+Au Collisions at sqrt(sNN) = 200 GeV
• Spectra and radial flow at RHIC with Tsallis statistics in a Blast-Wave description
• Charged Meson Rapidity Distributions in central Au+Au Collisions at sqrt(s_nn) = 200 GeV
• Low-Mass Dileptons at the CERN-SpS: Evidence for Chiral Restoration?
• Description of the RHIC p_T-spectra in a thermal model with expansion
• Dilepton Radiation at the CERN Super Proton Synchrotron
• Elliptic flow of identified hadrons in Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7--62.4 GeV
• Thermal Photons and Collective Flow at the Relativistic Heavy-Ion Collider
• Signatures of Thermal Dilepton Radiation at RHIC
• Properties of the QCD Matter -- An Experimental Review of Selected Results from RHIC BES Program
• Comprehensive Interpretation of Thermal Dileptons at the SPS
• Thermal Dileptons as Fireball Thermometer and Chronometer
• Mass, quark-number, and $\sqrt{s_{NN}}$ dependence of the second and fourth flow harmonics in ultra-relativistic nucleus-nucleus collisions
• Thermal Dilepton Radiation at Intermediate Masses at the CERN-SpS
• Pseudo-Critical Enhancement of Thermal Photons in Relativistic Heavy-Ion Collisions
• Strange particle production at RHIC in a single-freeze-out model
• Strange freezeout
• Constraining models of initial conditions with elliptic and triangular flow data
• An overview of experimental results from ultra-relativistic heavy-ion collisions at the CERN LHC: bulk properties and dynamical evolution
• The Freezeout Hypersurface at LHC from particle spectra: Flavor and Centrality Dependence
• Higher-order anisotropies in the Blast-Wave Model - disentangling flow and density field anisotropies
• Scaling of Elliptic Flow, Recombination and Sequential Freeze-Out of Hadrons in Heavy-Ion Collisions
• Reconstructing the final state of Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV
• Statistical hadronization model for heavy-ion collisions in a few GeV energy regime
• Rapidity Dependence of Charged Particle Yields for Au+Au at sqrt(sNN) = 200 GeV
• Blast Wave Fits to Elliptic Flow Data at $\sqrt{s_{\mathrm{NN}}}=$ 7.7--2760 GeV
• Kinetic freeze out conditions in nuclear collisions with $2A$ - $158A$ GeV beam energy within a non-boost-invariant blast-wave model
• Kinetic freeze-out in central heavy-ion collisions between 7.7 and 2760 GeV per nucleon pair
• Comprehensive simulation of heavy-ion collisions at non-zero baryon chemical potential
• Bayesian Inference of the Specific Shear and Bulk Viscosities of the Quark-Gluon Plasma at Crossover from $\varphi$ and $\Omega$ Observables
• Spheroidal expansion and freeze-out geometry of heavy-ion collisions in the few-GeV energy regime
• Hierarchy of kinetic freeze-out parameters in low energy heavy-ion collisions
• Hadron momentum spectra from analytical solutions of relativistic hydrodynamics